"We’re the same as Mary-Kate and Ashley! At least that’s what our mom tells us," Baylee said to Vogue.

"We can vibe off each other because we know each other so well," Kelsey said to Elle.

Their shared career trajectory is somewhat unusual. "We used to wear really heavy eyeliner; our dad was really nervous for us," Baylee said to Vogue. "I think he thought something was wrong with us. So he sent us to a makeup class, to build confidence."

According to Vogue, one of their teachers wound up becoming their agent. The rest is history.

Baylee went to visit Kelsey when she was away in Paris at a casting for Saint Laurent — but she got caught when she wasn't supposed to be there, according to Vogue.

Fortunately, it was fortuitous. "I was in the casting room hiding my face being like, 'My agency is going to kill me!' We aren’t supposed to go to each other’s castings!" Baylee said to Vogue. "I was hiding my face in the corner. We ran out and then my agent was like, 'They want you to go back!" The both scored the big gig.

The Calvin Klein campaign is huge for them. "I'd always looked at Calvin Klein ads growing up. That's an American brand, so it hits home for us. It's amazing to be part of their iconic family," Kelsey said to Elle.

CK2 is a gender-neutral cologne, and Kelsey told The Cut that she likes that. "I like it because today, gender’s not really black or white. It’s more gray. This perfume is showing gray. It’s filling all the gray area where traditionally it’s masculine or it’s feminine," she said.

They work out — as most models do. (And they take post-workout selfies, too.)

Here's Kelsey working out at New York Sports Club. She loves zumba, to the point that she got a hairline fracture in her foot from the class.

Here are the girls with their parents.

They're extremely close, and therefore they work well together. "In pictures, you can feel the energy and feel the bonds that we have. Two strangers can’t make a picture the way that two sisters who spend every moment together [can]," Kelsey said to The Cut.

"Especially twins. Because twins are born with that natural connection. You’ve shared so much throughout your lives, so you know so much about each other — I think we can feed off of each other very well. And it’s way more fun!" Baylee said to The Cut.